JP2603474B2 - Ground reinforcement structure and formwork used for it - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground reinforcement structure implemented to protect a sloping ground and a formwork used therein.

[Conventional technology]

As one of the methods of reinforcing slopes such as slopes, concrete concrete frames are being installed.However, in the near term, steel slopes have been installed on slopes in order to simplify construction and increase efficiency. Erecting a steelmaking formwork or steel mesh formwork, arranging rebar between the forms,
The rebar is fixed to the slope with anchor bolts, concrete is poured between the formwork, and a construction method of constructing the frame structure (for example, see JP-B-53-46361, JP-B-54-26801) ) Has been implemented.

[Problems to be solved by the invention]

However, in the conventional method as described above, since the material for construction is made of steel, it is heavy, especially on a slope having poor workability. In addition to the drawback, there is a drawback that the formwork and the reinforcing bar are rusted and corroded with the lapse of time from assembling the formwork and the reinforcing bar to placing concrete or the like. In addition, the structure constructed in this way has a steel material buried in it, so the concrete cover is insufficient, the concrete cracks, etc. There is a problem in that steel materials are corroded and expanded due to the influence of artificial environment such as gas and the like, and the structure is deteriorated, so that the original purpose cannot be fulfilled.

The present invention has been made in order to solve such a problem, and by using a special formwork that also serves as a reinforcing bar using a lightweight and excellent material instead of a steel material, the work is performed. An object of the present invention is to provide a ground reinforcement structure and a mold used therefor, which have extremely good performance, can construct a frame structure with high efficiency, and do not cause deterioration of the structure.

[Means for solving the problem]

The ground reinforcement structure of the first invention comprises a formwork 1 in which a shaft 2 made of a fiber bundle impregnated with a thermosetting resin is juxtaposed with a mesh 3 made of a fiber bundle impregnated with a thermosetting resin. Slope Ground Mountain 4
It is characterized in that concretes 8 are cast between the formwork 1 and 1 and the formwork 1 and 1 are buried in the concrete 8.

Also, the formwork used in the ground reinforcement method of the second invention is:
A reticulated body 3 made of a fiber bundle impregnated with a thermosetting resin, and an axial bar 2 arranged in parallel with the reticulated body 3 and impregnated with a thermosetting resin into a fiber bundle having a diameter larger than the fiber bundle. It is characterized by the following.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the present invention, a formwork 1 that is also used for reinforcing bars is used. As shown in FIG. 4, the formwork 1 is formed by shafts 2, 2 arranged in parallel at intervals and a mesh body 3 arranged between the shafts 2, 2. The shaft 2 and the mesh body 3 constituting the formwork 1 are lightweight (specific gravity: about 1.7), have a high tensile speed (about 60 kgf / mm ² ), and have the same thermal expansion coefficient as iron materials. Bundles of fibers having excellent corrosion resistance that hardly corrode due to chemicals such as acids and salts are integrally formed by impregnation and curing of a thermosetting resin. In this case, the intersection x between the shaft 2 and the mesh body 3 and the intersection x between the vertical and horizontal fiber bundles in the mesh body 3 are integrated by a thermosetting resin as a binder in a state where the fiber bundles intersect. ing. In the embodiment, by appropriately selecting the thickness of the fiber bundle to be used, the shaft 2 as the reinforcing reinforcing material of the concrete is formed so as to be thick, and the mesh 3 as the form plate is formed so as to be thin. I have.

As the above-mentioned fibers, continuous fibers such as glass fibers and carbon fibers are suitable, but in addition, for example, synthetic resin fibers, ceramic fibers, and the like, or those in which these fibers are appropriately combined can be used. In addition, the respective fibers in each fiber bundle are bound by the impregnation curing, and the thermosetting resin material for integrally bonding the respective crossing portions x has good adhesiveness to the fibers, and even the thermosetting resin material itself can be used. For example, a vinyl ester resin having sufficient strength is suitable, and examples thereof include an unsaturated polyester resin, an epoxy resin, and a phenol resin. In order to manufacture the mold 1 using these materials, for example, the fiber bundles are arranged in a grid and impregnated with a liquid thermosetting resin, and then the thermosetting resin is cured. Becomes a binder and the whole is integrated.

In the structure of the present invention, the formwork 1,1, which also serves as a reinforcing bar, formed as described above is disposed facing and disposed at a required interval on the ground 4 on the slope, and the formwork 1,1 is attached. Width stoppers 5, 5 are erected at various places between the upper shafts 2, 2 and connected to each other and assembled.Furthermore, a suitable place between the upper shafts 2, 2 of both the formwork 1, 1, for example, As shown in FIG. 3, at the position corresponding to the intersection of the construction frames,
An anchor connecting member 6 is erected, and an anchor 7 is connected thereto and fixed to the ground 4. Next, concrete 8 such as concrete or mortar is sprayed between the molds 1 and 1 to form the mold.
1 and 1 are buried in concrete 8.

In the method of reinforcing slope slopes, generally, as shown in FIG. 3, it is common to construct a so-called law frame in which beam-shaped concrete structures are assembled in a lattice shape. In this case, the molds 1 and 1 are assembled so as to intersect each other at the intersection of the normal frames. In addition, the length of each side of the legal frame also varies depending on the construction conditions. Since the above-mentioned formwork 1 used in the present invention is manufactured as a fixing material having a length suitable for transportation, at the site, it is cut to a required length or added, and assembled into a predetermined size. Will be attached.

In the construction of the legal framework as shown in FIG. 3, the anchor 7 facility is driven into the ground at the intersection of the legal framework, and in the case of hard ground, holes are drilled by a drilling machine or the like, and anchor bolts and the like are inserted. To join with the ground. In addition, as shown in FIGS. 1 and 3, in addition to the above, the anchor connecting member 6 is erected between the upper shafts 2, 2 penetrating the intersection, and the anchor 7 is attached thereto. Combine to formwork 1,1
And the ground 4 can be combined. In this case, since the anchor 7 is supported by the connecting member 6, a reliable resistance can be obtained regardless of the size of the legal frame.

The present invention can be widely applied not only to the above-mentioned law frame but also to concrete structures that reinforce slope ground such as beam-shaped or column-shaped structures.

5 and 6 show another embodiment of the mold 1 according to the present invention. The mesh 3 of the mold 1 is made up of an upright member 3a and an oblique member 3b as shown in FIG. It may be a combination, the sixth
As shown in the figure, the diagonal members 3c may be formed in a net shape so as to cross each other. In short, the reticulated body 3 of the formwork 1
If it can serve as a connection between 2 and 2 and function as a shear reinforcing bar and prevent the outflow of cast concrete 8,
The structure itself is not limited in any way.

FIG. 7 shows still another embodiment of the mold 1. In the mold 1, the shafts 2, 2 and the mesh 3 are not located on the same plane, and It is intended to locate the axial muscles 2, 2 at intervals in the transverse direction of the plane. In this case, the reticulated body 3 is formed in a shape excluding the axial muscles 2, 2, and
2 and 2 are formed separately from the net 3. That is, the axial muscle
2, 2 are integrally connected by a large number of connecting bars 9, 9 obtained by impregnating a thermosetting resin into a U-shaped thin fiber bundle whose upper and lower end portions are bent in the same direction. The fiber bundles constituting the streaks 2, 2 and the fiber bundles in the connecting streaks are arranged in a state as shown in FIG. 7, and are formed by curing a thermosetting resin impregnated with them. And, as shown, the connecting muscle 9,
9 is attached to the mesh member 3 to tie the binding materials 10 and 10 such as resin wires.
It is linked by In the mold 1 of this embodiment, as shown in FIG. 8, when the molds 1 and 1 are assembled, the shafts 2 and 2 can be positioned considerably inside the meshes 3 and 3.
Therefore, the shaft bars 2, 2 are buried sufficiently deep from the surface of the cast concrete 8, so that the meshes 3, 3
Because there is no problem even if the concrete cover is small,
It is possible to reduce or omit the spraying of concrete for embedding the formwork 1 and 1 after the concrete 8 is cast between the formwork 1 and 1, further simplifying the construction and increasing the cost It will be possible to down.

As shown in FIG. 9, another example of the formwork 1 in which the shafts 2, 2 can be positioned deeper than the mesh body 3 as in this embodiment is shown in FIG.
An example shown in FIG. 10 is also conceivable. That is, in the example shown in FIG. 9, the mesh body 3 is bent so that the upper and lower portions project inwardly 11, 11, and the shaft ends 2, 2 are integrally connected to the projecting ends. In the example shown in FIG. 10, the upper and lower portions of the mesh body 3 are bent inward, and the shafts 2, 2 are located in the middle of the bent portions 12, 12.

FIGS. 11 and 12 show still another embodiment of the formwork, in which the shafts 2, 2 are formed separately from the mesh body 3, and the binding material 10,
The point of connection by 10 is the same as the embodiment of FIG.
In this embodiment, the opposing lower shafts 2, 2 are integrally connected by horizontal streaks 13, 13 of a thin fiber bundle impregnated with a thermosetting resin, which is the same as the embodiment (FIG. 7). Similarly, they are integrated via a common thermosetting resin. In this embodiment, the width stopper 5 for connecting the shafts 2 and 2 to each other at the time of assembling the molds 1 and 1 becomes unnecessary, and the molds 1 and 1 can be assembled more efficiently.

In each of the above-described embodiments, the two shaft bars 2 are provided vertically, but the number of the shaft bars 2 can be appropriately increased or decreased.

〔The invention's effect〕

As described above, the ground reinforcement structure of the present invention includes a formwork in which a shaft formed by a fiber bundle impregnated with a thermosetting resin is bonded to a mesh body formed by a fiber bundle impregnated with a thermosetting resin. It is characterized by being placed side by side on a slope with a required interval, placing concrete between the forms, and embedding the forms in concrete. Since the use of a formwork that has been made, the assembly of the formwork is immediately arranged, and the work of assembling the formwork and arranging the reinforcement is greatly simplified, and the formwork is used as a reinforcing member to concrete. Since the shaft bars and the mesh body as the mold plate are each configured by a fiber bundle impregnated with a thermosetting resin and hardened, it is extremely light in comparison with conventional construction steel materials, In particular, work on slopes with poor workability is significantly reduced, You can rate well inexpensive construction.

In addition, the formwork that is also used for arranging reinforcing bars has corrosion resistance and uses almost no steel material, so it is affected by natural effects such as rainwater and artificial effects such as exhaust gas. Thus, there is no danger that the embedded material will be corroded and the structure will be degraded, and many excellent effects can be obtained, such as long-term stabilization of the structure.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a cross-sectional view, FIG. 2 is a cross-sectional view as viewed from the side of FIG. 1, and FIG. 3 shows a facility state of a legal frame according to the present invention. FIG. 4 is a cross-sectional plan view, FIG. 4 is a perspective view showing an embodiment of a mold used in the present invention,
FIGS. 5, 6, and 7 are each a perspective view showing another embodiment of the same formwork, and FIG. 8 is a sectional view showing an example of construction using the formwork of FIG. 7, FIG. 9, FIG. FIG. 10 is a perspective view showing still another embodiment of the same formwork, FIG. 11 is a slope view of a half of the formwork showing an example in which the shafts of the opposite formwork are integrally joined to each other, and FIG. 12 is the same formwork. It is sectional drawing which shows the example of construction using. DESCRIPTION OF SYMBOLS 1 ... Formwork 2 ... Axle 3 ... Reticulated body 4 ... Ground 7 ... Anchor 8 ... Concrete 9 ... Connecting bar

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teruyuki Nakatsuji 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Kenzo Sekishima 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Inside (72) Inventor Tadashi Fujisaki 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Kentaro Ikeda 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation

Claims (4)

(57) [Claims] 1. A mold formed by bonding a shaft made of a fiber bundle impregnated with a thermosetting resin to a net made of a fiber bundle impregnated with a thermosetting resin, and juxtaposed at a predetermined interval on the slope of the slope. And
A ground reinforcement structure characterized by casting concrete between the formwork and burying the formwork in the concrete. 2. A reticulated body made of a fiber bundle impregnated with a thermosetting resin, and an axial line bonded to the reticulated body and impregnated with a thermosetting resin in a fiber bundle larger in diameter than the fiber bundle. The formwork used for the ground reinforcement structure characterized by the above-mentioned. 3. A reinforcing bar of concrete reinforcing shaft is disposed at a distance from a plane of a mesh body forming a formwork plate.
3. The formwork according to claim 2, wherein said shank is integrated via a connecting bar for connecting said shaft bar and said mesh body. 4. The mold according to claim 3, wherein the shafts of the opposing forms are integrated via a horizontal line connecting them.